2228 Soyuz-Apollo, provisional designation 1977 OH, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 19 July 1977, by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[11] It was named after the Apollo–Soyuz Test Project.[2]
Orbit and classification
The dark C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.6–3.7 AU once every 5 years and 7 months (2,029 days). Its orbit has an eccentricity of 0.18 and an inclination of 2° with respect to the ecliptic.[1]
Physical characteristics
It has a rotation period of 5.4 hours and an albedo of 0.10 and 0.11, as determined by the space-based Akari and WISE missions, respectively,[6][4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes a lower albedo of 0.08.[3]
Naming
This minor planet was named after the joint Soviet-American space flight, the Apollo–Soyuz Test Project, carried on in 1975. The reversal of the names, "Soyuz–Apollo" rather than "Apollo–Soyuz", was not political, but to prevent confusion with the asteroid 1862 Apollo.[2] The official naming citation was published by the Minor Planet Center on 1 March 1981 (M.P.C. 5850).[12]
References
- ^ a b c d "JPL Small-Body Database Browser: 2228 Soyuz-Apollo (1977 OH)" (2016-11-23 last obs.). Jet Propulsion Laboratory. Retrieved 12 June 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(2228) Soyuz-Apollo". Dictionary of Minor Planet Names – (2228) Soyuz-Apollo. Springer Berlin Heidelberg. p. 181. doi:10.1007/978-3-540-29925-7_2229. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (2228) Soyuz-Apollo". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2016.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010.
- ^ a b Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID 118745497. Retrieved 7 December 2016.
- ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2228) Soyuz-Apollo". Geneva Observatory. Retrieved 7 December 2016.
- ^ a b Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. S2CID 8342929. Retrieved 7 December 2016.
- ^ Almeida, R.; Angeli, C. A.; Duffard, R.; Lazzaro, D. (February 2004). "Rotation periods for small main-belt asteroids". Astronomy and Astrophysics. 415: 403–406. Bibcode:2004A&A...415..403A. doi:10.1051/0004-6361:20034585.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 7 December 2016.
- ^ "2228 Soyuz-Apollo (1977 OH)". Minor Planet Center. Retrieved 7 December 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 December 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 2228 Soyuz-Apollo at AstDyS-2, Asteroids—Dynamic Site
- 2228 Soyuz-Apollo at the JPL Small-Body Database
